Astrodon 50mm Square SII Filter 3 nm FWHM

SKU: SII3_50SPRICE: 1,250.00

Astrodon 50mm Square SII Filter 3 nm FWHM Description

Imaging with narrowband filters has become very popular. It is an ideal tool to observe structure in emission nebula because it produces very high contrast, and is a wonderful means to enjoy our hobby even when the moon is up.

The Astrodon SII filter has become the preferred choice of imagers for the following important reasons:

• Parfocal with all Astrodon LRGB, C, H-a and OIII filters eliminating the need for refocusing.

• An incredible 90-92% transmittance at the SII emission wavelength to reduce your total imaging time.